Principal Accounting Policies and Basis of Preparation - Additional Information (Detail)	6 Months Ended
	Jul. 28, 2012
Principal Accounting Policies and Basis of Preparation [Line Items]
Approximate percentage of first quarter sales to annual sales	Slightly more than 20%
Approximate percentage of second quarter sales to annual sales	Slightly more than 20%
Approximate percentage of third quarter sales to annual sales	Little under 20%
Approximate percentage of fourth quarter sales to annual sales	40.00%
Maximum | US
Principal Accounting Policies and Basis of Preparation [Line Items]
Approximate percentage of operating income in fourth quarter	50.00%
Minimum | US
Principal Accounting Policies and Basis of Preparation [Line Items]
Approximate percentage of operating income in fourth quarter	40.00%